22225531 has 4 divisors (see below), whose sum is σ = 22240864. Its totient is φ = 22210200.

The previous prime is 22225519. The next prime is 22225537. The reversal of 22225531 is 13552222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22225531 - 2⁵ = 22225499 is a prime.

It is a super-2 number, since 2×22225531² = 987948456463922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22225537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5235 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (5560216).

Almost surely, 2^22225531 is an apocalyptic number.

22225531 is a deficient number, since it is larger than the sum of its proper divisors (15333).

22225531 is a wasteful number, since it uses less digits than its factorization.

22225531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15332.

The product of its digits is 1200, while the sum is 22.

The square root of 22225531 is about 4714.3961437283. The cubic root of 22225531 is about 281.1581747311.

Adding to 22225531 its reverse (13552222), we get a palindrome (35777753).

The spelling of 22225531 in words is "twenty-two million, two hundred twenty-five thousand, five hundred thirty-one".